本文介绍一种数字式万能测长仪。该仪器与传统的万能测长仪相比,不同之处在于读数方式采用了光栅数显技术,每毫米100线对的光栅,经两块光栅透光和遮光效应后,转化成原始电信号,该信号由数显表进行1 x 5 x 4倍频后,以七位数码管显示测量结果。其原理如图1所示,图2是相应的波形图。一、光栅传感器光栅传感器是将机械线位移转换成电信号 This article describes a digital universal measuring instrument. The instrument compared with the traditional universal length measuring instrument, the difference is that the reading method uses a grating digital display technology, 100 lines per millimeter grating, the two grating light and shade effect, into the original electrical signal, The signal from the digital display for 1 x 5 x 4 times the frequency, with seven digital display measurement results. The principle shown in Figure 1, Figure 2 is the corresponding waveform. A grating sensor grating sensor is the mechanical line displacement into electrical signals